We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Hazard implications of the late arrival of the 1945 Makran tsunami.
- Authors
Rajendran, C. P.; Ramanamurthy, M. V.; Reddy, N. T.; Rajendran, Kusala
- Abstract
The 1945 Makran earthquake is known to have generated tsunami surges that affected the coasts of Iran, Pakistan, Oman and India. However, there is a significant delay in tsunami arrivals at various coastal sites with respect to the origin time of the earthquake. We explored the archival data to obtain arrival times and run-up heights at some important port cities along the Pakistan and Indian coasts. Numerical model for wave propagation based on the available rupture parameters predicts arrival times 17 and 28 min ahead of the actual arrival of the first surge at Karachi and Pasni respectively. There was also a significant discrepancy (>3 h) between the origin time of the earthquake and the observed arrival times of the second wave at various locations, which was the largest of the surges. We attribute this disparity in arrival time of the tsunami surges to submarine landslides triggered by the earthquake. Submarine slide-triggered tsunami is an underestimated threat in the Indian Ocean, and therefore, the regional tsunami hazard models of both the Arabian Sea and the Bay of Bengal should incorporate such overlooked mechanisms.
- Subjects
KARACHI (Pakistan); PAKISTAN; TSUNAMIS; EARTHQUAKES; LANDSLIDES
- Publication
Current Science (00113891), 2008, Vol 95, Issue 12, p1739
- ISSN
0011-3891
- Publication type
Article